Iodization of textile fabrics



fabric is'moistenedor soakedin PatentedDec. 4, 1945 2,390,391] Iomza'rIoN or 'rnx'rmn rsnarcs Char1es 1tudolphHans Bitter. l r

" W No Drawing. 1 Application A mt 4,- 1942',sem1= No-. '453,609 In Great Britain' Au'gust 25, 1941- .3:

I The present invention relatesto the iodiz'ation oftextile fabrics. i

It 'isan object of the present invention to provide aprocess for impregnating all kind of textile fabrics with any fixed dose of free and active iodine, and in such a manner that the impregnated fabric give of! substantially its full content of free andactive iodine when the impregnated other suitable liquid.

;It is another object toprevent the iodine from:

. affecting substantially thetextil e tissues.-

It is still another object to protect the active iodine from-decomposition and atmospheric influences.

It is a further object to preserve the hydrophile qualities of the impregnated fabric.

The impregnated fabric according to this invention is particularly useful for surgical purposes since the material can be kept sterilized and dry. When put on a wound it gives 01! active iodine as soon as it is moistened by thesecretion of the wound. Alternatively, by soaking the impregnated material in water or any other suitable liquid it is possible to obtain a solution of iodine which may be used for surgical purposes.

According to the invention the textile fabric is impregnated with isinglass and iodine. Sugar and glycerine may be added. Experiments have shown that the fabric impregnated according to the invention is able to be stored for a considerable time without losing its advantageous qualities. A possible explanation for this result seems to be that the isinglass protects the tissues of the fabric against being affected by the iodine while the sugar and glycerine act as an adhesive. The process of impregnating the fabric according to this invention may comprise the following steps:

(1) The textile fabric is freed from any dressings or hot pressing ingredients by washing and/or boiling in the usual way.

wateror in machine, about 20 per cent of the solution.

(2) When dry and if the impregnated fabric is 7 used for surgical purposes it is sterilized by means of saturated steam at high temperature.

(3) The fabric is immersed in a solution of water (H2O), sugar (Cal-121011), glycerine CaI-IMOH) 3) (6) The material is allowed to l (7) The process No. 5 is repeated, but the aqueous solution of iodine contains-nowan, ad-

mixture'of alcohol and sugar.

(8) The material is anowedadlyesns. In order that the invention-may be more clearly understood a particular process of impregnating' fabr'ic with iodine which has proved. very suc:

f The textile'fab'ric is thoroughly freed of all-hot.

cessf'ul in practice will now be: described in pressing ingredients,-=particularly of any starch bywashing and/0r boiling in known manner. If

intended for" surgical purposesxascfabricj hydrophile gauze may be" used. The 'fabricis sterilized by means ofjsaturated steam at 'a' temperature, of

about to C. a

' '2 gms. of purified isinglass as used for medicinal w purposes are mixed with 100 gins. of water. The mixture is left swelling up for about 24 hours. It is then slowly heated on a water bath to about 60 C. while it is permanently stirred. When the isinglass is completely dissolved, the solution is filtered. To the filtered solution 0.024 gm. of glycerine and 0.05 gm. of sugar (CizHnOn) are added. Subsequently, the solution is, again, well stirred.

The textile fabric is immersed in the solution thus prepared until it is saturated. The temperature ofthe solution should be kept during this step at at least about 50 C.

The fabric is then passedrthrough a wringing machine so that it contains, after passing the Subsequently the material is thoroughly dried in any known manner.

The fabric is then passed through a first aqueous solution of iodine. The percentage of iodine is chosen according to requirements. A 4 to 4.5 per cent iodine solution meets normally almost all requirements. The solution may consist 012 gms. resublimed iodine; 4 gms. potassium iodide and 50 gmsl distilled water. The fabric is immersed in the solution until it is saturated, and is then passed through a wringing machine so that it contains after passing the machine about 20 per cent of the solution. The metal parts of the wringing machine are preferably protected by a coating of an acid resisting lacquer.

The fabric is now thoroughly dried in a drying chamber. having a good air ventilation at a temperature between about 18 and- 25 C. During during which time it should be protected against light, moisture and heat.

iodine solution which contains half the amount of re-sublimed iodine and potassium iodide contained in the first solution but to which are added 0.05 gm.,lof alcohol and 0.02 gm. of sugar. The temperature of this second solution should be at The fabric is then passed through a second least 15 C. The fabric is not saturated with v the second solution but is passed quickly there through and is thereupon at once passed through a wringing machine so that it contains finally ,about 5% of the solution. It is then again dried as before. For storagev the impregnated material is well packed in a suitable packing material. For normal climates it is sufficient to wrap, the material in waxed paper and 'in addition in thick, dark packaging paper and to store itat a dry place. For tropical climates the waxed paper is replaced by plasticized polyvinyl.

I claim: 1. Method of preparinggan iodine-impregnated ing the fabric in a first aqueous solution of iodine, drying it again, passing the fabric through a second aqueous solution of iodine containing an admixture of alcohol and sugar, and again drying the fabric.

4. Method of impregnating a textile fabric with iodine comprising the steps of freeing the fabric from hot pressing ingredients, immersing the fabric'in an aqueous solution'of sugar, glycerine' and isinglass', drying'the fabric, immersing the fabric in a first aqueous solutionofiodine until it is saturated, wringing the fabric slightly,

drying the fabric, passing the fabric quickly throughasecond solution of iodine in water containing in addition alcohol and sugar, and again drying thefabric.

5. Method asdefined in claim 4 for impregnating atextilefabric with iodine for surgical textile fabric comprising'the' steps of impregnating .the' fabric first with isinglass and then with a solution of iodine.

-2. Method of impregnating a textile fabric, withv iodine comprising the steps of immersing; the fabric in an aqueous'solution of isinglass drying the fabric, immersing the fabric in a solution ofiodine, and drying the fabric. v

3. Method of impregnating a textile fabric with iodine comprising the steps of'immersing the fabric in an aqueous solution of sugar, glycer ine and isinglass,-drying the fabric, immers purposes, wherein the fabric, after it has been freed from hot pressing ingredients, is sterilized.

6.;Method as defined in claim 4 for iinprege nating a textile fabric with iodine for',,surgica1 p rpos swherein the fabric is hydro hilegauze which, after it has been freed from hot pressing I ingredients,- is sterilized by means of saturated J steamsat a temperature ofllabo'ut 150 to 180 C.

"1. 1A textile fabric,impregnated with isiriglaiss i;

' and iodine, the isin'glass preye'ntingjsubstantially any chemical reaction between the fabricjandthe iodine and binding the iodine mechanically with; out substantially reacting chemically with the iodine, whereby free actiye, iodine. ,is released from the impregnated fabric when nioistenedif ."CHARLES' litilDOLP-H-HANSRITTERQ 

